OK - in that case we have some specific SimRel testing to do:
1- Which bundles ends up SimRel - or do both end up there. I assume that it will be the Orbit one because it is more recent as far as p2 is concerned (not sure, just best guess).
In 4.24 SDK there is the Maven version of asm and asm.tree.
In 2022-06 M2 p2 repo there is Maven version of asm.tree (from platform p2 repo) and Orbit version of asm (from Xtext's p2 repo)
2- Starting from the SDK, does installing features from SimRel cause both to be installed, and if so, are both resolved.
Starting with M2 SDK, installing Xtext SDK from 2022-06 M2 simrel causes asm.tree from Orbit to be installed:
osgi> ss org.objectweb.asm
"Framework is launched."
id State Bundle
283 RESOLVED org.objectweb.asm.tree_9.3.0
374 RESOLVED org.objectweb.asm_9.3.0.v20220409-0157
Both versions of asm are in my plugins directory after installing xtext:
$ ll eclipse/plugins/*asm*
-rw-r--r-- 1 jonah jonah 122176 Apr 28 19:00 eclipse/plugins/org.objectweb.asm_9.3.0.jar
-rw-rw-r-- 1 jonah jonah 136049 May 5 19:57 eclipse/plugins/org.objectweb.asm_9.3.0.v20220409-0157.jar
-rw-r--r-- 1 jonah jonah 52669 Apr 28 19:00 eclipse/plugins/org.objectweb.asm.tree_9.3.0.jar
So is that OK?